轮机英语三管轮试题 分油机.doc

轮机英语Lesson 171682. Emulsification of oil will occur when mixed withA. air B. black oil C. water D. ice cream1683. A centrifuge arranged to separate two liquids is known as_.A. an oily water separator B. a purifier C. a centrifugal compressor D. a clarifier1684. A centrifuge arranged to separate impurities and small amounts of water from oil is known as_.A. an oily water separator B. a purifier C. a centrifugal compressor D. a clarifier1685. When a clarifier is running the impurities and water collect at the bowl_.A. center B. periphery C. inlet D. upper parts1686. For many years marine centrifuges were designed for_ operation, that is the machines were run for a period during which solids accumulated in the bowl. The machine was stopped when the accumulated solids began to impair its performance.A. purifying B. batch C. long period D. temporary1687. For a purifier, changing to a gravity disc with larger hole diameter will move the interface towards the_.A. bowl periphery B. bowl center C. upper surface D. lower surface1688. For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the_.A. bowl periphery B. bowl center C. upper surface D. lower surface1689. The_ of the gravity disc is too big. It cause oil to flow through the water outlet. We changed the disc and no oil is found in the water outlet.A. gravity B. diameter C. circumference D. cylinder1690. Dirty oil must be_ before being used again .A. mixed with clean oil B. purified C. heated D. strained1691. Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?A. Height of the machine B. Temperature of the liquid seal C. Gravity disc D. Bowl diameter1692. For a L.O. purifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will_.A. be interrupted B. move downwards C. move outwards D. retain original position1693. When in operation, it is unavoidable that a small amount of oil_ through leakage, and in order to compensate for these leaks the system is connected to a feed pump.A. escapes B. overheats C. expands D. accelerates1694. Coalescence is the breakdown of surface tension between oil droplets in an oil/water mixture, which causes them to join and_ in size.A. expand B. extract C. increase D. decrease1695. When a centrifuge is arranged to separate impurities and small amount of water from oil, it is known as a_.A. purifier B. separator C. filter D. clarifier1696. _ is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.A. A filter B. A centrifuge C. A distiller D. A generator1697. In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to_.A. the outlet of oil B. the outlet of water C. the bowl periphery D. the center of bowl1698. _ is the breakdown of surface tension between oil droplets in an oil water mixture which causes them to join and increase in size.A. Wear B. Contaminating C. Coalescence D. Coarse separating1699. The position of the interface between oil and water within the centrifuge is achieved by the use of_.A. gravity disc B. centrifugal bowl C. a stack of discs D. main sealing ring1700. To start the ejection process the oil feed to the centrifuge is first shut off and the oil remaining in the bowl removed by admitting_.A. flashing water B. operating oil C. flushing water D. sealing water1701. The interface between the liquid seal (water) and the oil should be positioned_ possible to the bowl periphery.A. as far as B. as soon as C. as close as D. as closer as1702. What is used to purify water and foreign matters from the fuel oil in the following?A. Compressor B. Separator C. Evaporator D. Fuel pump1703. They understand the_ of automatic sludge discharging of the purifier. But they are not good in practice.A. principle B. principal C. theory D. case1704. The diameter of the gravity disc is too big. It causes oil to flow through the water outlet. We changed the disc and no_ is found in the water outlet.A. water B. oil C. scale D. ridge1705. If oil density were greater than water s, the oil separator_.A. did work B. would work well C. didnt work D. wouldnt work1706. Sediment collects in a tubular purifier_.A. on top cover B. on sides of bowl C. in drain line on the discs D. on the discs1707. Both fuel oils and lubricating oils require _before passing to the engine.A. treatment B. heating C. cooling D. boiling1708. The treatment of the fuel oils involves storage, heating, filtering and _.A. centrifuging B. pressurizing C. atomization D. igniting1709. _is used to separate two liquids or a liquid and solids as in contaminated oil.A. Oily-water separator B. Purifier C. Clarifier D. Centrifuge 1710. Where a centrifuge is arranged to separate two liquids, it is known as a _.A. purifier B. clarifier C. liquid-separator D. oily-water separator1711. Where a centrifuge is arranged to separate impurities and small amounts of water from oil it is known as a _.A. A. Oily-water separator B. Purifier C. Clarifier D. Centrifuge 1712. “A centrifuge consists of an electric motor driving a vertical shaft on the top of which is mounted the bowl assembly.”According to this sentence, we can know that _is mounted on the top of the vertical shaft.A. a centrifuge B. an electric motor C. a bowl assembly D. a driving motor1713. A centrifuge of which the bowl is arranged as the upper and lower parts separate discharges the sludge _.A. by opening the separator manuallyB. by separating the lower part from the upper part automaticallyC. by separating the upper part from the lower part automatically D. continuously1714. Before the in a purifier is ejected, _.A. the oil feeding is stopped and replaced by admitting flushing water.B. the flushing water feeding is stopped and replaced by admitting oil.C. the feeding of dirty oil and flushing water is stopped.D. the feeding of dirty oil and flushing water is admitted.1715. Main engines as well as auxiliary engines operating on heave fuel should have continuous _ on the lubricating oil, either according to the bypass or batch principles. A. filtering B. centrifuging C. depositing D. operating 1716. Modern centrifuge designs enable continuous over a considerable period oftime. This is achieved by _ which is timed to discharge the sludge at regularintervals. A. an injection process B. an ejection process C. a separation process D. a heating process1717. When two oil separators are working in series, they should work with _A. both as clarifiers B. first one as clarifier, second one as purifierC. both as purifiers D. first one as purifier, second one as clarifier 1718. One of the reasons that cause oil flowed from sludge outlet of a self cleaning separator is _.A. seal water supply be cut off B. make up water supply be cut off C. oil outlet valve closed or not open sufficiently D. the flow rate of oily water is too much 1719. When separating lube oil in oil separator, the optimal separating quantity is_of the rated quantity on name plate A. 100% B. 1/2 C. 1/5 D. 1/31720. When separating fuel oil in oil separator, the separating quantity is _of the rated quantityA. 100% B. 80% C. 1/2 D. 1/31721. The separating effect of oil separator is not good, the reason may be _A. too little seal water B. improper gravity disc C. oil discharging pump not working very well D. low water level of the working water 1722. When separating the lube oil without additive, it is usually cleaned with hotwater .the aim is to remove _from it A. acid B. sludge C. mechanical impurity D. salinity 1723. When finish working on the oil separator, you should _firstlyA. cut off the power B. cut off the oil inlet C. open guide water valve D. close oil outlet valve 1724. To ensure oil separator working in normal condition, the interval between twosludge dischargings should not exceed _A. 2h B. 4h C. 5h D. 6h1725. _can cause oil flow from water outlet of a separator A. oil inlet valve opening too quickly B. oil temperature too high C. diameter of gravity disc too small D. viscosity of oil too low 1726. _ can not cause oil flow from water outlet of self cleaning separator A. oil temperature too high B. diameter of gravity disc too large C. oil temperature too low D. high level tank out of water 1727. _can cause oil flow from sludge outlet of self cleaning separatorA. too much sludge accumulated in separator bowl B. diameter of gravity disc too largeC. high level tank lack of water D. oil input too rapidly1728. _ are required to remove small quantities of water from a much larger amount of oil. Additionally it must separate solids.A. Incinerators B. Centrifuges C. Oily water separators D. Incinerator1729. On board supply vessels, a centrifuge is normally used to purify _.A. cooling water B. fuel oil C. sea water D. diesel intake air1730. For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable _.A. throughput B. additive percent C. cetane number D. TBN number1731. Heavy residual fuel oils are heated prior to centrifuging to _.A. reduce fuel weight B.increase specific gravity C.separate fuel from lube oil D.